Malicious PDF — malware analysis report

Static analysis result for SHA-256 867d40beb5f2e6b9…

MALICIOUS

PDF

33.9 KB Created: 2021-06-25 09:29:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c7e9fa9b05996a792a7bb3c2f71f220f SHA-1: ebfa24c574d5ea250078bf5528ac99960367a2ee SHA-256: 867d40beb5f2e6b9c46be174a1fa25f6e5bb71b79e02721b4c23e9b2144f5dcc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure, designed to lure users into downloading potentially unwanted or malicious files. The document body and embedded URLs suggest a theme of 'free game currency' or 'hacks' to entice clicks. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a malicious redirection workflow, likely involving JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/how-to-get-free-faces-with-no-robux-works-game-hack In PDF document text
    • http://autoskola-scp.com/files/coin-free-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-rocitizens-cheat-codes-may-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/woman-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/promocodes-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCE 22164 bytes
SHA-256: 33862675e95f00affd16884f07ee111ee8da45c6c7264a8984a05957673d550b
font_01_sfnt_off00005de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE5 19640 bytes
SHA-256: 8dc9657f3e6c0cf3daeb80ebd896404074798e74250614d72ed430df7ffe8513

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